chapin



L. N. GHAPIN.

CHIMNEY cowL. v No. 99,162. Patented Jan. 25, 1870,

N4 PETERS, Phato-Lithognphon wnninpun. u. c.

0 all whom it may concern after set forth.

(landed $121M LINUS N. OHAPIN, OF NEW LISBON TOWNSHIP, NEW YORK.

Letters Patent N 99,162,

dated January 25, 1S7Q.

CHIMNEY-COWL.

The Schedule referred to in these Letters Patent and making part of the same.

Be it known that I, LIXUS H. GHAIIN, of NewvLishon township, in the county of Otsego, and in the State of New York, have invented. certain new and useful Improvements in Ohimney-Cowls; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, making a part of this specification, in which- Figure 1 is a side elevation of my improved device;

Figure 2 is a plan view of the base-plate and cowlframe;

Figure 3 is a vertical cross-section of the same on the line a: x of fig. 2;

Figure 4 is a cross-section of the spindle, showing the means employed for fastening down the cow];

Figure 5 is a side elevation of the same; and

l igure'ti is a perspective view of the fastening-loop.

Letters of like name and kind refer to like parts in each of the figures.

My invention relates to a class of devices designed for application to the tops of chimneys, in order to increase and render uniform their draught; and

It consists, principally, in the peculiar form of the cowl, and in the manner of its suspension, as is herein- It further consists in the form of the bed-plate; in the means employed for securing the same to the top of the chimney; and, also, in the employment, upon said plate, of a gutter for the reception of rain, and in the form of the openings provided for its escape therefrom.

It finally consists in the peculiar form of the fastening used for securing the cowl upon the spindle, as is hereinafter shown. 7

1n the annexed drawing- A represents the bed-plate, having a general rectangular form, with the sides extended near their centre, lengthwise, so as to complete a circle somewhat larger than the base of the cowl.

Secured to, and forming a part of the bed-plate A, is a V-shapcd-circular rim, B, having an outside diameter corresponding with the. width of the parallel sides of the plate, inside of which rim said plate is removed so as to form two openings 0 upon either side of anarrow strip or bar, 1). I

A sectional rim, 1), corresponding. in size and shape, transverscl y with that before described, extends around the outer edge of the-circular portion of the plate, parallel with the rim 15, the space between said rims forming a gutter or groove for the reception of the base of the cowl, and, also, for the reception of the watcrdrip plug from thesame during a storm.

Between the contiguous ends of the sections E are;

spaces 15, for the escape of the water from the groove, which spaces or openings may have the form shown at g the sides of the bed-plate; or, if desired, may be protected from the direct force of the wind by means of a semicircular projection, E, extending outward and forward from the end of one section to or beyond the end of that immediately adjoining, (as shown at the ends of said plate.)

Rising vertically from the cross-bar'D, at the centre of the circle formed by the rims Band E, is a spindle,

G, which furnishes an axial pivot for the cowl H, resting thereon.

As seen in fig. 1, the cowl H is formed of a single sheet of metal, the upper side of which has an upward inclination of thirty-five degrees, or thcreabout, while its lower edge is horizontal, and conforms to the shape of the groove, into which it extends immediately outside of the inner rim B, leaving the front end of said cowl open.

A cross-bar, I, provided with an opening for the passage of the spindle, is secured to, and extends transversely across the cowl, near its lower end, and serves as a guide therefor, while a strip of sheet-metal, It, socured at one end to the under side of said cowl, and projecting forward immediately over the spindle, furnishes a bearing for the same, and permits the cowl to revolve freely thereon. v

In order to prevent the accidental displacement of the upper end of the spindle, a strip of sheet-metal, K, bent in the form of a flat arch, is secured, at its ends, to the side of the cowl, at or near the intersection of the cross-bar I, and from thence passes upward and across, just beneath the step Inwhcre it is provided with a suitable opening for the passage of said spindle.

If desired, additional strength may be secured to the cowl by means of a semicircular brace, L, attached to its base, in which event it might be foundadvantageous to connect therewith the cross-bar I and arch K, and construct the whole of cast-metal, thereby ren dering the construction and adjustment of the cowl more easy than if the frame were formed of separate parts, and afterward united.

In figs. 4, 5, and 6, is shown a fastening for locking the coivl upon the spindle, so as to prevent it from being raised vertically, which fastening consists of a link or loop, M, of metal, bent sidewisc in a semicircular form, so that when placed around the spindle, its opencnds project beyond the surface thereof, and per mit the insertion within said ends of a pin or key, at, which, being of sufficient width to press against said spindle, firmly locks the loop thereon.

Under ordinary circumstances, the weight of the base-plate andcowl would be sufficient toprevent them from being displaced upon the chimney by the wind; but in order to render their position still more secure,

foul-ribs N are provided upon the lower side of said base-plate, and so arranged as that each' shall cross one corner of the chimney in a diagonal line.

If, now, a course of mortar be spread upon the top of the chimney, and the basic-plate placed thereon, the ribs will embed themselves therein, and, when said mortar becomes hard, will firmly hold said base-plate in position, rendering unnecessary the employment of other fastenings.

A vane, O, secured in position upon the upper side of the cowl, at its'forward end, completes the device, the operation of which is as follows:

By the action of the wind upon the vane, the open end of the cowl is turned to leeward, so that no air can enter the chimney through its upper end, but, on the contrary, the current of air, being deflected upward by the inclination of the cowl, creates a vacuum within the same, which causes an upward motion of the air contained within the chimney, and, consequently, creates or adds to its draught.

It will be seen that no rain can be driven into the chimney, .while such as falls upon the cowl passes into the gutter at its base, and from thence passes outward through the openings in the outer wall of the same.

The especial object of the outer wall of the gutter is to protect the lower edge of the cowl from the wind,

' and prevent air from being forced beneath said cowl into the chimney, as the effect of its admission would be to impair the draught.

The air will, of course, enter the gutter through the openings for the escape of water, but by the use of the overlapping ends E',. this objection will be almost if not entirely removed.

Having been thoroughly tested, this device is known to possess all of the hereinbefore-descrlbed advantages, in addition to which the obstruction to the top of the chimney is so slight as to produce no sensible effect upon its draught, when the air without is perfectly still.

Having thus fully set forth the nature and merits of my invention,

*What I claim as new, and desire to secure 'by Letters Patent, is-

The base-plate A, provided with. the rims B and E, the ribs N, and the spindle G, in combination with the cowl H, or its equivalent, substantially as and for the purpose specified. 7

Also, the employment of the rims B and E upon the base-plate A, by means of which a groove or gutter is formed for the reception of the lower edge of the cowl, substantially as herein shown and described.

Also, protecting the openings F from the direct action of the wind, by means of the overlapping projections E, substantially as herein set forth.

Also, the cowl H, constructed in the peculiar form shown, in combination with the frame I, K, and L, substantially as described, and for the purpose set forth.

Also, the curved link or loop M, and the key or'pin m, substantially as and for the purpose specified.

In testimony that I claim the foregoing, I have hereunto set my hand, this 28th day of October, 1869.

LINUS N. CHAPIN.

Witnesses v GEO. S. PRINDLE, EDM. F. BROWN. 

